a header cable that allows the SE-8051ICD to be used as an in-circuit debugger

a serial cable to connect a PC to the SE-8051ICD

a power supply and mains cable

a 4k byte evaluation version of the Crossware 8051 Development Suite which includes an ANSI C compiler, Assembler, Simulator/Virtual Workshop, Debugger, Code Creation Wizards, Embedded Development Studio IDE and on-line manuals